/**
 * Copyright (C) 2011 Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.appspot.eusms.recipients;

import android.telephony.PhoneNumberUtils;
import android.text.TextUtils;

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

public class RecipientsFormatter {

    private static String parseBracketedNumber(String recipient) throws RecipientFormattingException {
        int begin = recipient.indexOf('<');
        int end = recipient.indexOf('>');
        String value = recipient.substring(begin + 1, end);

        if (PhoneNumberUtils.isWellFormedSmsAddress(value))
            return value;
        else
            throw new RecipientFormattingException("Bracketed value: " + value + " is not valid.");
    }

    private static String parseRecipient(String recipient) throws RecipientFormattingException {
        recipient = recipient.trim();

        if ((recipient.indexOf('<') != -1) && (recipient.indexOf('>') != -1))
            return parseBracketedNumber(recipient);

        if (PhoneNumberUtils.isWellFormedSmsAddress(recipient))
            return recipient;

        throw new RecipientFormattingException("Recipient: " + recipient + " is badly formatted.");
    }

    public static List<String> getRecipients(String rawText) throws RecipientFormattingException {
        ArrayList<String> results = new ArrayList<String>();
        StringTokenizer tokenizer = new StringTokenizer(rawText, ",");

        while (tokenizer.hasMoreTokens()) {
            results.add(parseRecipient(tokenizer.nextToken()));
        }

        return results;
    }

    public static String formatNameAndNumber(String name, String number) {
        // Format like this: Mike Cleron <(650) 555-1234>
        //                   Erick Tseng <(650) 555-1212>
        //                   Tutankhamun <tutank1341@gmail.com>
        //                   (408) 555-1289
        String formattedNumber = PhoneNumberUtils.formatNumber(number);
        if (!TextUtils.isEmpty(name) && !name.equals(number)) {
            return name + " <" + formattedNumber + ">";
        } else {
            return formattedNumber;
        }
    }


}
